Vacuum manifold



FIG. 1 is a rear elevational view of a vacuum manifold showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a vacuum manifold, as shown and described. 